diff mbox series

[v2,1/1] drm/msm/dpu: Fix error return code in dpu_mdss_init()

Message ID 20210510063805.3262-2-thunder.leizhen@huawei.com
State New
Headers show
Series drm/msm/dpu: Fix error return code in dpu_mdss_init() | expand

Commit Message

Leizhen (ThunderTown) May 10, 2021, 6:38 a.m. UTC 
The error code returned by platform_get_irq() is stored in 'irq', it's
forgotten to be copied to 'ret' before being returned. As a result, the
value 0 of 'ret' is returned incorrectly.

After the above fix is completed, initializing the local variable 'ret'
to 0 is no longer needed, remove it.

In addition, when dpu_mdss_init() is successfully returned, the value of
'ret' is always 0. Therefore, replace "return ret" with "return 0" to make
the code clearer.

Fixes: 070e64dc1bbc ("drm/msm/dpu: Convert to a chained irq chip")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>

---
 drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

-- 
2.26.0.106.g9fadedd

Comments

Stephen Boyd May 10, 2021, 4:55 p.m. UTC | #1 
Quoting Zhen Lei (2021-05-09 23:38:05)
> The error code returned by platform_get_irq() is stored in 'irq', it's
> forgotten to be copied to 'ret' before being returned. As a result, the
> value 0 of 'ret' is returned incorrectly.
>
> After the above fix is completed, initializing the local variable 'ret'
> to 0 is no longer needed, remove it.
>
> In addition, when dpu_mdss_init() is successfully returned, the value of
> 'ret' is always 0. Therefore, replace "return ret" with "return 0" to make
> the code clearer.
>
> Fixes: 070e64dc1bbc ("drm/msm/dpu: Convert to a chained irq chip")
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index 06b56fec04e047a..6b0a7bc87eb75b8 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -225,7 +225,7 @@  int dpu_mdss_init(struct drm_device *dev)
 	struct msm_drm_private *priv = dev->dev_private;
 	struct dpu_mdss *dpu_mdss;
 	struct dss_module_power *mp;
-	int ret = 0;
+	int ret;
 	int irq;
 
 	dpu_mdss = devm_kzalloc(dev->dev, sizeof(*dpu_mdss), GFP_KERNEL);
@@ -253,8 +253,10 @@  int dpu_mdss_init(struct drm_device *dev)
 		goto irq_domain_error;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
+	if (irq < 0) {
+		ret = irq;
 		goto irq_error;
+	}
 
 	irq_set_chained_handler_and_data(irq, dpu_mdss_irq,
 					 dpu_mdss);
@@ -263,7 +265,7 @@  int dpu_mdss_init(struct drm_device *dev)
 
 	pm_runtime_enable(dev->dev);
 
-	return ret;
+	return 0;
 
 irq_error:
 	_dpu_mdss_irq_domain_fini(dpu_mdss);